700 grizzly EPS problem

I have noticed since its been getting down below freezing at night. For the first hour i ride mt grizzly, at slow speeds my power stering will twitch really quick and pull to the right and goes back striaght. It only lasts for a split second, but its enough to freak you out. And it will do it about every 15-25sec. for about an hour. I was thinking i might have some water in a electrical connection and it freezes in there. Any how im open for any suggestions.